Floor grinder and polisher.



B. P. G. JAGOBSKZ E. L. LINDROTH.

FLOOR GRINDER AND POLISHEE.

APPLICATION FILED 831 18, 1909.

Patented Feb. 1,1910.

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ELI-m B; 15. G. JACOBS 6; E. L. LINDROTH. FLOOR GRINDER AND romsma.APPLICATION IIILBD SEPT, 8, 1909.

9428 174. Patented Feb. 1,1910

4 SHEETS-SHEET 3.

B. F. C. JACOBS & E. L. LINDROTH.

FLOOR GRINDER AND POLISEER.

APPLICIAI'ION FILED BEPT.8,1909.

I Patented Feb. 1, 1910.

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FLOOR GlEtIlINDER AND PULISHJEJHL.

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To all whom it may concern:

Be it known that we, BENJAMIN v l (3.

JACOBS and EMANUEL L. LINDROTH, citizens of'the United States ofAmerica, residing at (1) Vest Elizabeth'and (2), Wilson, in the countyof Allegheny and State of Pennsylvania, have invented certain new anduseful Improvements in Floor Grinders and Polishers, of which thefollowing is a specification, reference being had therein to the accomanying drawing. v

T is invention relates to floor grinding and polishing machines, and theobject of our invention is to provide a machine that can beadvantageously used in connectlon with lar e floor spaces for removingirregularities" roln the floor and for polishing and cleaning the same.I

Our invention aims to provide a grlndmg and olishing machine wherein arotary adjusta le polishing head is employed for op eratin upon a floorand a rotary brush used for p0 ishing and cleaning the floor, both ofthese elements being driven from a suitable Source of power andcontrolled by an operator upon the machine.

Briefly described, our machine comprises a truck upon which is locatedan engine or motor adapted to drive the truck. Suspend ed from the truckis an adjustable rotary grinding and polishing head adapted to be drivenfrom. the source of power located upon the truclg also a polishing andcleaning brushwhich is driven from the same source of power andcontrolled by the operator- 7 upon the machine.

The invention will be hereinafter de-' scribed in detail and thenclaimed, and ref erence will now be had to the drawings forming a partof this specification, wherein there is illustrated a preferredembodiment of the specification of Letters Patent Application filedficptember it, 1909.

Patented ll ebo f, rare, Serial 1W0. 516,731.

invention, but it must be understood that the.

structural elements thereof can be varied or changed, as to the shape,size and manner of assemblage without departing from the spirit of theinvention.

In the drawings :-Fignre 1 is a side elevation of our machine partlybroken away and partly in section, Fi 2 is a plan of the machine, Fig.3is an'en arged vertical sectional View of the grinding and polishinghead, Fig. 4. is'a horizontal sectional view of the same, Fig. 5 is across sectional view of the machine, and Fig. 6 is a detail in planillustrating the driving gear mechanism.

9. The wheels Gjand 9 are, provided with pneumatic or solid rubbertires, whereby the wheels cannot injure the surface over which theymove, 1 v

r The frame 1 is provided with a transverse support 10 fora steeringmechanism, said mechanism comprising 'an angularly disposed shaft allhaving the upper end thereof provided with a hand whec1'12, while thelower end is attached to chains 13, these chains being fastened to theaxle 8. When i the shaft 11 is rotated, the chains are adapt ed to windand'unwind upon the lower end of the shaft to turn the axle 8 in adesired direction.

1 L denotes an operators scat supported byv frames 15 above the rearaxle 5, this seat being convenient to the hand wheel 12 and otheroperating levers which will 'be hereinafter described.

16 denotes transverse supports for an ena motor, the armature shaft 18is provided with a transverse wheel 19 for a belt or chain 20 adapted totravel over a wheel 22 mounted upon the forward end of a shaft 21journaled in depending bearings 23 and trans verse frames 24: all ofwhich are in the frame 1.

25 denotes hangers carried by the supports 24- and journaled in saidhangers is a longitudinal shaft 26 provided wit-h a worm 27 adapted tomesh with a gear Wheel 28 mounted upon the axle 5. Loosely mounted uponthe shaft 26 is a bellcrank lever 29 and adjacent to said lever is lineda small gear wheel 30, The small gear wheel 30 is adapted to mesh with agear wheel 31 revolubl connected to the bellcranlr lever 29. gear wheel31 is provided with a friction supported loo The

wheel. 32 adapted to frictionally engage a Wheel 33 mounted uponthe'shaft 21. The bell crank lever 29 is provided with a revoluble gearwheel 34 adapted to mesh with the gear wheel 31, the said gear wheel 34having a friction wheel 35 adapted to be moved into engagement with thewheel 33. The upper end of the bell crank lever 29 is loosely connected,as at 36 to the crank 37 of a shaft 38, journaled in a bearing 39arranged upon one of the supports 24 beneath the operators seat 14. Theopposite end of the shaft 38 is provided with an operating lever 40 andthis lever is rovided with a spring held locking mechanism 41 adapted toengage a rack 42 carried by the support 24.

' 43 denotes a transverse support at the rounded end of the frame 1, andrevolubly mounted in said support is a depending vertical shaft 44. Uponthe lower end of the shaft 44 is mounted the grinding and polishing headof our machine, said head comprising a collar 45 provided withperipheral langes 46 and 47. The collar 45 is movably connected to theshaft 44 by keys 48, these keys preventing the head from becomingaccidentally'detached from the shaft 44, and.

allowing the collar to be elevated, as will presently appear. Connectedto the flange 47 by bolts 49 and nuts 50 is a circular head 51 made ofsandstone or a similar abrasive 'material. Arranged between the flanges46 and 47 and loosely engaging the collar 45 is a two part yoke 52having diametrically opposed arms 53 which are loosely connected tocranks 54 of a shaft 55. The shaft, 55 is journaled in dependingbearings 56 carried by opposite sides of the frame 1.. One endof theshaft 56 is provided with an operating lever 57, and said operatinglever is equipped I with a spring pressedlocking mechanism similar tothe mechanism heretofore refer ed to.

58 denotes a beveled gear wheel moun ed upon the shaft 44 and adapted torotate therewith. This beveled gear wheel meshes 1 with a beveled gearwheel 59 mounted upon the rear end of the shaft 21.

6G denotes a coil spring encircling the shaft 44 between the beveledgear wheel '58 and the flange 46, said spring normally maintaining therotary, grin ing and polishing head in a lowered position.

61 denotes a rotary brush orcleaner disosed at an angle beneath theframe 1 and in ront of the rotary grinding and polishing head 51. Oneend of the brush 61 is revolubly mounted in a bearing 62 pivotallyconnected, as at 63 to the outer side of the,

framel. The bearing 62 adjacent to the brush 61 is pivotally connectedby a link 63 to the crank 64 of a shaft 65, said shaft being journaledin suitable bearings 66 provided therefor on the frame 1. The shaft hasan operating lever 67 provided with 65 a locking mechanism 68 adapted tocotiperate with a rack69 in holding the pivoted hearing 62 in anadjusted position. 7 0 denotes a depending bearing carried by theopposite side of the frame 1 for the opposite end of the brush 61, saidbrush being loosely mount- 7 ed in this bearing, whereby the oppositeend of the brush can be raised by the bearing 62. The end of the brushis provided with a beveled gear wheel 71 adapted to mesh with a beveledgear wheel 72 mounted upon a shaft 7 73, journaled in a hanger 74suspended from the frame 1. The shaft 73 is provided with a belt wheel75, while the shaft 2 1 is provided with a belt wheel 76. Adapted totravel over the wheels 75 and 76 is a belt 77, this 30 belt imparting arotary movement to the brush 61 during the rotation of the shaft 21.

A machine constructed in accordance with our invention is operated inthe following manner :The operator upon the seat 14 35 steers themachine in any desireddirection through the medium of the hand wheel 12,and upon placing the motor 17 in operation, the shaft 21 is revolvedthrough the medium of thefriction wheels 32 and 33, gear wheels 31 and30, worm 27 and gear wheel 28, and the machine is moved forward. To movethe machine rearward, the operator manipulates the lever 40 and throughthe medium of the crank 35 elevates the bell crank lever 29, placing thefriction wheel 35 in engagement with the friction wheel 33, and throughthe medium of gear wheels 34, 31 and 30 drives the machine in theoplposite direction from I that just described. )uring the operation 10of the machine the grinding and polishing head 51 can be raised throughthe medium of the operating lever 57. By elevating the head 51 certainspaces upon the floor can be passed over by the machine without grindmgor polishing the spaces.

The brush or cleaner 61 can be partially elevated by the operator throuh the medium of the lever 67, it being desirable to elevate the brushwhen certain ortions of the floor are not to be swept or c eaned. It isin' connection with this brush, that we can use felt or other materialfor polishing a floor that has been ground by the head 51.

From the foregoing description it will be observed that our machine hasbeen designed for large floor spaces and that the 'tru'ckfpermits of themachine being easily moved and does not necessitate any manual labor onthe part of the operator other than guiding the machine and attending tothe levers 40, 57 and 67.

Having now described our invention what we claim as new, is

1. A machine of the t e described, comprising a frame, a suita l; sourceof p'pwer -located upon said frame for moving the frame back and forth,means carried by'said frame for steering the frame in a desireddirection, a rotary horizontal grinding and rotary engulariy disposedbrush arranged erated by the first mentioned carried by sald frame forreversing the era-ma polishing head carried by said frame and adapted tohe 0 erated from said source of povvenand an a justable angulariy disosed rotary brush arranged beneath said ranie and adapted to be revolvedfrom said source of energy. 2. Amachine of the type described, C011!-prising trucks, a frame supported by said trucks, means arrangednponsaid frame for moving said, trucks, a rotary horizontal grinding andelishing head arranged at the rear end or said trucks and adapted to beoperated by the first mentioned means, a

between said trucks and adapted to he op- 1 means, means movement ofsaid trucks, and means carried by said frame for raising the'saidgrinding and polishing head. x 3. A machine of the type described, com-1.

' tures in the presence oi two prising trucks, a frame supported by saidtrucks means arranged upon said frame for moving said trucks, a rotaryhorizontal grinding and oiishing head arranged at the rear end or saidtrucks and adapted to be operated by the first mentioned means, a rotaryanguiariy disposed brush arranged between said trucks and adapted. to beop- 0 rated by the first mentioned means means carried by said frame forreversing the movement of said trucks means carried by said frame forraising the said. grinding.

and polishing head, and means carried by said frame for raising; saidbrush.

in testimony whereof we ai't'nr our signa- Witnesses. BENJAMIN it. C.JACOBS. EMAIIUEL iii. LiiNDtttiTiti Witnesses:

KARL H. BUTLER, MAX H. Editmiiovrrz.

